<!-- Avoid a crash caused by adding pseudo element content in two places.
     See AXNodeObject::CanAddLayoutChild(). https://crbug.com/1172038 -->
<style>
span:before { display: inherit; content: ""; -webkit-column-count: 1; }
</style>
<span role="group" style="display: list-item"></span>
<span class="empty"></span>
